When I see images of awesome looking food, I think "Hey, I want to try that!"

Same with pictures of people sky-diving, drinking, racing in fast cars, etc.

All of these things can be pretty dangerous, in fact far more dangerous than having sex. Better start the bans!

In the USA, they put disclaimers on skydiving and racing cars. Stuff like "don't try this" or "at your own risk" or "these are professionals, this is dangerous" etc. Also tobacco and alcohol companies are prohibited from advertising to minors.

Interesting theory. Alas, many cannot see the difference between sex and naked body.

Lack of video games is hardly going to prevent a kid of that certain from realizing that the opposite seems a bit different all of a sudden.

These bans are puritanical, not pragmatic.